Fungus Fuels Tree GrowthPoplar is the fastest growing hardwood tree in the western United States, making it an energy feedstock of particular interest to the U.S. Department of Energy (DOE). The fungus is almost always found among and within poplar trees, and in an effort to understand its influence on the plant, a team of scientists studied what happens to the tree’s physical traits and gene expression when the fungus is present.

Better Genome Editing for BioenergyCRISPR-Cas9 is a powerful, high-throughput gene-editing tool that can help scientists engineer organisms for bioenergy applications. Cas9 needs guide RNA to lead it to the correct sequence to snip—but not all guides are effective. Researchers created a set of guide RNAs that were effective against 94 percent of the genes in a lipid-prolific yeast.

Cultivating Symbiotic Antarctic MicrobesIn the Proceedings of the National Academy of Sciences, researchers employed multiple microbiology and ‘omics techniques to experimentally determine that Nanohaloarchaeota are not free-living archaea but rather symbionts.

Methane Flux in the AmazonWetlands are the single largest global source of atmospheric methane. This project aims to integrate microbial and tree genetic characteristics to measure and understand methane emissions at the heart of the Amazon rainforest.

Insights into Functional Diversity in NeurosporaThis proposal investigates the genetic bases of fungal thermophily, biomass-degradation, and fungal-bacterial interactions in Sordariales, an order of biomass-degrading fungi frequently encountered in compost and encompassing one of the few groups of thermophilic fungi.

Improving the Cacao Genome and PhytozomeAn updated reference genome for Theobroma cacao Matina 1-6 has now been completed and released by HudsonAlpha scientists, with the help of Mars Wrigley funding. The annotated genome has been updated to a high quality modern standard and includes RNA-seq data. The improved genome is available for comparative purposes on the latest version of the JGI plant portal Phytozome (phytozome-next.JGI.doe.gov).

Mining IMG/M for CRISPR-Associated ProteinsResearchers report the discovery of miniature CRISPR-associated proteins that can target single-stranded DNA. The discovery was made possible by mining the datasets in the Integrated Microbial Genomes and Microbiomes (IMG/M) suite of tools managed by the JGI. The sequences were then biochemically characterized by a team led by Jennifer Doudna’s group at UC Berkeley.

What Happens Underground Influences Global Nutrient CyclesThrough the Facilities Integrating Collaborations for User Science (FICUS) program, the Environmental Molecular Sciences Laboratory (EMSL) and the DOE Joint Genome Institute (JGI) have selected 11 proposals for support from 53 received through a joint research call.

CSP Functional Genomics Call OngoingThe CSP Functional Genomics call is to enable users to perform state-of-the-art functional genomics research and to help them translate genomic information into biological function. Proposals submitted by January 31, 2019 will be part of the next review.

Learning to LookUsing machine learning, JGI researchers combed through more than 70,000 microbial and metagenome datasets, ultimately identifying more than 10,000 inovirus-like sequences compared to the 56 previously known inovirus genomes.

JGI Early Career Researchers in mSystems Special IssueJGI researchers are among the authors who offer perspectives on what the next five years of innovation could look like. In one article, Rex Malmstrom and Emiley Eloe-Fadrosh outline more targeted approaches to reconstruct individual microbes in an environmental sample. In a separate article, Simon Roux makes a pitch for readers to get involved in the developing field of virus ecogenomics.

Hidden Giants in Forest SoilsIn Nature Communications, giant virus genomes have been discovered for the first time in a forest soil ecosystem by JGI and University of Massachusetts-Amherst researchers. Most of the genomes were uncovered using a "mini-metagenomics" approach that reduced the complexity of the soil microbial communities sequenced and analyzed.

Published in:

Author(s):

DOI:

10.3389/fmicb.2017.02501

Abstract:

Geodermatophilaceae (order Geodermatophilales, class Actinobacteria) form a comparatively isolated family within the phylum Actinobacteria and harbor many strains adapted to extreme ecological niches and tolerant against reactive oxygen species. Clarifying the evolutionary history of Geodermatophilaceae was so far mainly hampered by the insufficient resolution of the main phylogenetic marker in use, the 16S rRNA gene. In conjunction with the taxonomic characterisation of a motile and aerobic strain, designated YIM M13156(T) and phylogenetically located within the family, we here carried out a phylogenetic analysis of the genome sequences now available for the type strains of Geodermatophilaceae and re-analyzed the previously assembled phenotypic data. The results indicated that the largest genus, Geodermatophilus, is not monophyletic, hence the arrangement of the genera of Geodermatophilaceae must be reconsidered. Taxonomic markers such as polar lipids and fatty-acids profile, cellular features and temperature ranges are indeed heterogeneous within Geodermatophilus. In contrast to previous studies, we also address which of these features can be interpreted as apomorphies of which taxon, according to the principles of phylogenetic systematics. We thus propose a novel genus, Klenkia, with the type species Klenkia marina sp. nov. and harboring four species formerly assigned to Geodermatophilus, G. brasiliensis, G. soli, G. taihuensis, and G. terrae. Emended descriptions of all species of Geodermatophilaceae are provided for which type-strain genome sequences are publicly available. Our study again demonstrates that the principles of phylogenetic systematics can and should guide the interpretation of both genomic and phenotypic data.